The Canon EF 17-35mm f/2.8L USM (reviewed in issue #10) is the successor to the original EF 20-35mm f/2.8L AFD version. To give an idea how the focal lengths from 20mm to 35mm differ, here are some photos, including a one shot with a 50mm lens to show how much view the lens can take in. Shot with 50mm lens At 35mm At 28mm At 24mm At 20mm   << Back to Main . 1 . 2 . 3 .